Hmm well I've read plenty of posts on automotive forums about leaky sunroofs. Maybe it's a European car thing. Although my last Jetta's didn't leak and neither does my SAAB's. My Porsche's sunroof was leaking but the seals were probably original. I replaced them with new that were so much thicker I can barely get it to close properly and now it doesn't leak.Problems in the sense that it won't open and close or when it does open it's off track and doesn't go all the way back as it's supposed to. Mainly electrical issues.
The only time I have seen a factory roof leak is in an old rust bucket with LOTS of speed holes.
It's not fun driving in the rain and have water dripping all over you!
OP- save that 1000$ and put it to towards something more useful!
Apparently clogged drains are the most common cause for that problem though.